Apparatus for tin-plating.



PATENTBD APR. 4, 1905.

, F. L. YOUNG. APPARATUS FOR TIN PLATING.

APPLIUATION FILED PEB.'1, 1904.

NITED STATES Patented April 4, 1905.

PATENT OFFICE.

APPARATUS FOR TIN-PLATING.

SPECIFICATION forming part of Letters Patent No. 786,336, dated April 4, 1905. Application filed February 1, 1904. Serial No. 191,438.

To all w/tom it may concern:

Be it known that I, FRANK L. YOUNG, a citizen of the United States, residing at Boston, county of Suffolk, State of Massachusetts, have invented an Improvement in Apparatus for Tin-Plating, of which the following description, in connection with the accom panying drawings, is a specification, like letters on the drawings representing like parts.

My invention relates to an apparatus for plating tin, and has especially to do with the tinishing of the tin-plate, and is designed more particularly to remedy defects found to exist in apparatus now in use.

The nature of the invention will appear from the followingspecification and is defined in the appended claims.

Figure 1 is a side view, chiefly in section, of the entire, apparatus. Fig. 2 is an end view of the same.

A represents a pot containing molten tin, (indicated at B.) In the upper part of the pot a layer of oil (indicated at O) is provided. Above the pot and mounted thereon is a pair of squeeze delivery-rolls D D, driven by a pulley E and intermeshing gears (Z (Z. The apparatus thus far described has been commonly used. The plate of sheet-iron to be tinned is passed through the bath of molten tin B in any usual manner, not here necessary to describe. It is then passed upward through the bath of oil into the nip of the rolls D D, which rolls themselves are so placed as to dip into the oil. The result of this operation is that, the plate F of sheet-iron covered with tin and forming the tin-plate is subjected to pressure between the rolls D D, which finish off the plate and compress it and its coating of tin to the desired gage or thickness. The object of passing the tin through the oil and coating the rolls D D with oil is mainly to prevent the coatingof tin from being removed from the plate during its passage through the rolls. In using this apparatus it has been found that the plates of tin after coming from the apparatus are frequently and usually stained, and polishing and dusting operations, requiring much time and expense, are necessary to remove these oil stains. I have come to the conclusion that this is due to the fact that oil collects in the jaws of the rolls D D after the passage of one plate and before the entrance of the succeeding plate into the nip of the rolls. It will be noted that the passage of the plates F being necessarily more or less intermittent the rolls D are carrying oil upward, and this oil naturally remains and is deposited in the jaws of the rolls at the point marked G. When the next plate enters,it meets this mass of oil, with which it becomes coated at one end, and thereby the objectionable stains are formed upon the plate. In my apparatus, designed to obviate this defect, I mount above and adjacent to the rolls D D a pair of auxiliary squeeze-rollsH H, which are preferably driven at the same speed as the rolls D D and maybe so driven by intermeshing gears /1. /l, carried by the two rolls H H and intermeshing gears K K, carried by one of each of the pairs of rolls H H,D D. Each of the rolls H H, I provide with means for re moving oil from the surface of the rolls. This means illustrated herein consists of a pair of pivotally-mounted scrapers M M, held in contact with the roll H by springs m. Between these scrapers is placed an absorbent material, (shown at 0,) capable of withstanding heat. It will thus be seen that when the plate F passes from the rolls D D, covered more or less with oil, it enters the nip of the rolls H H and the oil upon the surface of the plate F passes to. the surface of the rolls H H, from which surface it is removed by suitable means, as herein illustrated, so that the surface of the rollsI-I H as they come in contact with the plate are substantially clean.

The result of the passage of the plate through the auxiliary rolls H H thus operates to remove the oil therefrom which causes the objectionable stains, and at the same. time it further finishes and compresses the plate F as desired, the result being a smooth un- 4 stained tin-plate.

The scraping means may be varied as desired. They may remove the oil entirely from the face of the rolls H, or if it be found that a slight amount of oil should be left upon the rolls they may readily be adjusted to allow therefor; but it will usually be found that sufficient oil is brought along with the plate F,

which it is the object of this device to remove to prevent any damage to the plate during its passage through the rolls H H.

I have illustrated two metallic scrapers M M; but only one may in some instances be found sufficient. To render the rolls quite clean, I have illustrated an absorbent material 0, which may be of mineral wool, asbestos, or any such absorbent which will stand the heat; but this may or may not be used, as found desirable. The second scraper acts to remove any lint or material which might pass onto the roll from the absorbent material.

This apparatus results not only in the prevention of the stains upon the plate, but also a large saving of oil, since the oil removed by the rolls H H can be passed back into the pot A, and the oil taken up by the absorbent material 0 may be removed therefrom by boiling or otherwise.

While I have shown a particular form of apparatus, it will be understood that my invention is not limited thereto, since various means of applying oil to the rolls D may be used, and the arrangement of the rolls is not limited to a vertical sequence, as herein shown. Furthermore, while 1 have described the apparatus as for tin-plating, for which it is especially designed, I do not desire to restrict myself to the use of the device for this purpose alone, and when I use the term tin-plating in the specification and claims I refer to plating with any metal which demands treatment in a similar way to tin.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a tin-plating apparatus; a pot to contain molten tin; a pair of squeeze deliveryrolls adjacent thereto; means for supplying oil to the surface of said delivery-rolls; a pair of auxiliary squeeze-rolls beyond said deliveryrolls and out of contact with the oil-supply; and means for removing oil from the surface of said auxiliary rolls.

2. In a tin-plating apparatus; a pot to contain molten tin; a pair of squeeze deliveryrolls located above and adjacent thereto; means for su iplying oil to the surface of said delivcry-rolls; a pair of auxiliary rolls above said delivery rolls and out of contact with the oilsupply; and means for removing oil from the surface of said auxiliary rolls.

3. In a tin-plating apparatus; a pot to contain molten tin; a pair of squeeze deliveryrolls adjacent thereto; means for supplying oil to the surface of said delivery-rolls; a pair of auxiliary squeeze-rolls beyond said deliveryrolls and out of contact with the oil-supply; and a scraper adjacent to and acting upon the surface of each of said auxiliary rolls to remove oil from the surface thereof.

4. In a tin-plating apparatus; a pot to contain molten tin; a pair of squeeze deliveryrolls located above and adjacent thereto; means for supplying oil to the surface of said delivery-rolls; a pair of auxiliary rolls above said delivery-rolls and out of contact with the oilsupply; and a scraper adjacent to and acting upon the surface of each of said auxiliary rolls to remove oil from the surface thereof.

5. In a tin-plating apparatus; a pot to contain molten tin; a pair of squeeze deliveryrolls adjacent thereto; means for supplying oil to the surface of said delivery-rolls; a pair of auxiliary squeeze-rolls beyond said deliveryrolls; a pair of scrapers adjacent to and acting upon the surface of each of said auxiliary rolls; and absorbent material between said pairs of scrapers whereby oil is removed from the surface of said auxiliary rolls.

6. In a tin-plating apparatus; a pot to contain molten tin; a pair of squeeze deliveryrolls located above and adjacent thereto; means for supplying oil to the surface of said delivery-rolls; a pair of auxiliary rolls above said delivery-rolls; a pair of scrapers adjacent to and acting upon the surface of each of said auxiliary rolls; and absorbent material between said pairs of scrapers whereby oil is removed from the surface of said auxiliary rolls.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK L. YOUNG. Vitnesses:

NATHAN HEARD, MABEL PARTELow. 

